Instruction Manual

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MAX4198/MAX4199

Micropower, Single-Supply, Rail-to-Rail

Precision Differential Amplifiers

________________________________________________________________

Maxim Integrated Products

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 408-737-7600 ext. 3468.

General Description

The MAX4198/MAX4199 low-power, Rail-to-Rail

differ-

ential amplifiers are ideal for single-supply applications

that benefit from a low 0.01% gain error. The MAX4198

is factory trimmed to a fixed gain of +1V/V, and the

MAX4199 is trimmed to a fixed gain of +10V/V. Capable

of operating from a single +2.7V to +7.5V supply or

from dual ±1.35V to ±3.75V supplies, they consume

only 42µA while achieving -3dB bandwidths of 175kHz

(MAX4198) and 45kHz (MAX4199). These amplifiers

feature a shutdown mode that reduces the supply cur-

rent to 6.5µA.

The MAX4198/MAX4199 can drive 5kΩ loads to within

100mV from each rail. The standard differential amplifi-

er configurations provide common-mode rejection of

90dB for the MAX4198 and 110dB for the MAX4199.

The input common-mode voltage range for the

MAX4198 extends 100mV Beyond-the-Rails™.

The MAX4198/MAX4199 are offered in a space-saving

8-pin µMAX package. For complete micropower, rail-to-

rail instrumentation amplifiers, see the MAX4194–

MAX4197 data sheet.

Applications

Instrumentation Amplifier Building Block

Differential Voltage Amplifiers

Data-Acquisition Systems

Portable/Battery-Powered Equipment

Transducer Interface

Current-Sense Amplifiers

Features

♦ Low 0.01% Gain Error

♦ High Common-Mode Rejection: 110dB (MAX4199)

♦ 10µV Input Offset Voltage (MAX4199)

30µV Input Offset Voltage (MAX4198)

♦ +2.7V to +7.5V Single-Supply Operation

♦ 42µA Supply Current

♦ 175kHz (MAX4198) and 45kHz (MAX4199)

-3dB Bandwidth

♦ 6.5µA Shutdown Current

♦ Rail-to-Rail Outputs Drive 5kΩ Loads

♦ Input Voltage Range Extends 100mV Beyond-the-

Rails (MAX4198)

♦ Available in Space-Saving 8-Pin µMAX Package

OUT

FBV

SHDN

IN-

IN+

REF

µMAX/SO

TOP VIEW

MAX4198

MAX4199

19-1445; Rev 0; 4/99

PART

MAX4198EUA

MAX4198ESA -40°C to +85°C

-40°C to +85°C

TEMP. RANGE

PIN-

PACKAGE

8 µMAX

8 SO

Pin Configuration

Ordering Information

Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.

Beyond-the-Rails is a trademark of Maxim Integrated Products.

GAIN

(V/V)

MAX4199EUA

MAX4199ESA

-40°C to +85°C

-40°C to +85°C 8 µMAX

8 SO 10

MAX4198

MAX4199

25k (250k)25k

( ) ARE FOR MAX4199 ONLY.

IN-

IN+

OUT

REF

Functional Diagram

Summary of content (12 pages)

PAGE 1
9-1445; Rev 0; 4/99 Micropower, Single-Supply, Rail-to-Rail Precision Differential Amplifiers Rail-to-Rail® The MAX4198/MAX4199 low-power, differential amplifiers are ideal for single-supply applications that benefit from a low 0.01% gain error. The MAX4198 is factory trimmed to a fixed gain of +1V/V, and the MAX4199 is trimmed to a fixed gain of +10V/V. Capable of operating from a single +2.7V to +7.5V supply or from dual ±1.35V to ±3.
PAGE 2
MAX4198/MAX4199 Micropower, Single-Supply, Rail-to-Rail Precision Differential Amplifiers ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC to VEE)..................................................+8V All Other Pins to GND ......................(VEE - 0.3V) to (VCC + 0.3V) Output Short Circuit Duration (to VCC or VEE)............Continuous Continuous Power Dissipation (TA = +70°C) SO (derate 9.09mW/°C above +70°C) ..........................471mW µMAX (derate 4.1mW/°C above +70°C) .......................
PAGE 3
Micropower, Single-Supply, Rail-to-Rail Precision Differential Amplifiers (VCC = +5V, VEE = 0V, RL = 25kΩ tied to VCC / 2, VREF = VCC / 2, V SHDN = VCC - 1.5V, typical values are at T A = +25°C, TA = TMIN to TMAX, unless otherwise noted.) (Note 1) PARAMETER Capacitive Load Stability -3dB Bandwidth SYMBOL CONDITIONS MIN TYP CL BW-3dB MAX UNITS 690 pF VOUT ≤ 0.1Vp-p, VCM = VCC / 2 175 kHz Slew Rate SR VOUT = 2Vp-p step 0.07 V/µs Settling Time to 0.1% ts VOUT = 2Vp-p step 34 µs 0.
PAGE 4
MAX4198/MAX4199 Micropower, Single-Supply, Rail-to-Rail Precision Differential Amplifiers ELECTRICAL CHARACTERISTICS—MAX4199 (+5V Supply) (VCC = +5V, VEE = 0V, RL = 25kΩ tied to VCC / 2, VREF = VCC / 2, V S HDN = VCC - 1.5V, typical values are at TA = +25°C, TA = TMIN to TMAX, unless otherwise noted.
PAGE 5
Micropower, Single-Supply, Rail-to-Rail Precision Differential Amplifiers (VCC = +5V, VEE = 0V, RL = 25kΩ tied to VCC / 2, VREF = VCC / 2, V S HDN = VCC - 1.5V, typical values are at TA = +25°C, TA = TMIN to TMAX, unless otherwise noted.) (Note 1) PARAMETER SYMBOL Input Logic Voltage High (Note 3) VIH Input Logic Voltage Low (Note 3) VIL CONDITIONS MIN TYP MAX UNITS VCC - 1.5 V VCC - 2.5 V SHDN Input Bias Current V SHDN = VCC - 1.
PAGE 6
Typical Operating Characteristics (VCC = +5V, VEE = 0V, RL = 25kΩ to VCC / 2, V SHDN = VCC - 1.5V, small-signal VOUT = 100mVp-p, large-signal VOUT = 1Vp-p, TA = +25°C, unless otherwise noted.) MAX4198 SMALL-SIGNAL GAIN vs. FREQUENCY 2 MAX4198 42 3 2 1 0 GAIN (dB) MAX4199 41 40 39 -1 -2 0 -1 -2 -3 -3 37 -4 -4 36 -5 -5 35 -6 -15 10 35 TEMPERATURE (°C) 60 -6 0.1k 85 POWER-SUPPLY REJECTION vs. FREQUENCY 10k 100k FREQUENCY (Hz) 1M 0.
PAGE 7
Micropower, Single-Supply, Rail-to-Rail Precision Differential Amplifiers VOLTAGE NOISE DENSITY vs. FREQUENCY TOTAL HARMONIC DISTORTION VOLTAGE NOISE vs. FREQUENCY THD + VOLTAGE NOISE (%) 1k MAX4198 100 SMALL-SIGNAL PULSE RESPONSE MAX4198toc12 MAX4198toc11 1.000 MAX4198toc10 VOLTAGE NOISE DENSITY (nV/√Hz) 10k INPUT 50mV/div 0.100 0.010 MAX4199 OUTPUT 50mV/div 0.
PAGE 8
Typical Operating Characteristics (continued) (VCC = +5V, VEE = 0V, RL = 25kΩ to VCC / 2, V SHDN = VCC - 1.5V, small-signal VOUT = 100mVp-p, large-signal VOUT = 1Vp-p, TA = +25°C, unless otherwise noted.
PAGE 9
Micropower, Single-Supply, Rail-to-Rail Precision Differential Amplifiers MAX4198 INPUT COMMON-MODE RANGE vs. SUPPLY VOLTAGE INPUT COMMON-MODE VOLTAGE (V) VREF = VCC/2 6.5 5.5 4.5 3.5 2.5 1.5 0.5 8.5 INPUT COMMON-MODE VOLTAGE (V) MAX4198toc28 7.5 MAX4198toc29 MAX4199 INPUT COMMON-MODE RANGE vs. SUPPLY VOLTAGE VREF = VCC/2 7.5 6.5 5.5 4.5 3.5 2.5 1.5 0.5 -0.5 -0.
PAGE 10
MAX4198/MAX4199 Micropower, Single-Supply, Rail-to-Rail Precision Differential Amplifiers Rail-to-Rail Output Stage The MAX4198/MAX4199 output stage incorporates a common-source rail-to-rail structure which maximizes the dynamic range of the differential amplifier. The output can swing to within 100mV from each rail with a 5kΩ load to VCC / 2 (see Typical Operating Characteristics). IN- FB VCC Shutdown Mode The MAX4198/MAX4199 have an active-low shutdown input.
PAGE 11
Micropower, Single-Supply, Rail-to-Rail Precision Differential Amplifiers also be used as an instrumentation amplifier building block. The circuit of Figure 7 takes advantage of the 10pA (max), 0.1pA (typ) bias current of the MAX406A to form an instrumentation amplifier similar to the MAX4194 family, except with lower input bias currents. The MAX406A's low 1.2µA supply current maintains a low overall supply current.
PAGE 12
Chip Information TRANSISTOR COUNT: 250 SUBSTRATE CONNECTED TO VEE Package Information 8LUMAXD.EPS MAX4198/MAX4199 Micropower, Single-Supply, Rail-to-Rail Precision Differential Amplifiers Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.